Photo sharing app Instagram is one of the major success stories from the app world, notching up a cool million downloads within three months of launch in October 2010. Today it has over 9m registered users and well over 10m downloads under its belt, despite

Similar to PolyMath, this is an online community for people who want to collaborate to solve problems. Just as any developer can view GitHub for open source projects to contribute to, any Free Learner…

Last week, we launched publisher leaderboards on substack.com to help publishers find new subscribers and subscribers find great publishers. We’ve received a lot of good feedback since the launch, but…